/Engine/Source/Runtime/Engine/Public/WorldCollision.h
It includes basic Query Parameter, Response Parameter, Object Query Parameter as well as Shape of collision testing
struct FCollisionParameters
FCollisionQuery...
CollisionQueryParam
Collision Trace Parameters
FCollisionShape
CollisionShape
Contains Collision Shape data including dimension of the shape
FCollisionObjec...
ObjectQueryParam
FCollisionRespo...
ResponseParam